Английская Википедия:734 Benda

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Шаблон:Use dmy dates Шаблон:Infobox planet

734 Benda (prov. designation: Шаблон:Mp or Шаблон:Mp) is a large background asteroid from the outer regions of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 11 October 1912.[1] For its size, the dark X-type asteroid has a relatively short rotation period of 7.1 hours. It was named after the discoverer's wife, Anna Benda.[2]

Orbit and classification

Benda is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[3][4][5] It orbits the Sun in the outer asteroid belt at a distance of 2.8–3.5 AU once every 5 years and 7 months (2,040 days; semi-major axis of 3.15 AU). Its orbit has an eccentricity of 0.10 and an inclination of 6° with respect to the ecliptic.[6] The body's observation arc begins at the discovering Vienna Observatory on 23 February 1920, almost eight years after its official discovery observation.[1]

Naming

This minor planet was named by friends of the discoverer after Anna Benda, second wife of Johann Palisa, whom he married in 1902. However, the Шаблон:MoMP was erroneously attributed to the Czech composer Karel Bendl (1838–1897) in previous editions of the Dictionary of Minor Planet Names.[2]

Physical characteristics

Benda is an X-type asteroid in both the Tholen- and SMASS-like taxonomic variants of the Small Solar System Objects Spectroscopic Survey (S3OS2).[4][7] In agreement with its low albedo (see below), this object has also been classified as a C-type and P-type asteroid.[8]

Rotation period

In October 2013, a rotational lightcurve of Benda was obtained from photometric observations over two nights by Robert Stephens at the Center for Solar System Studies Шаблон:Obscode in California. Lightcurve analysis gave a well-defined rotation period of Шаблон:Val hours with a brightness variation of Шаблон:Val magnitude (Шаблон:Small).[9]Шаблон:Efn

In August 1995, a first period of Шаблон:Val hours was determined by Stefano Mottola (Шаблон:Small).[8] In March 2004, French amateur astronomer René Roy obtained a period of Шаблон:Val hours with an amplitude of Шаблон:Val magnitude from three nights of observations (Шаблон:Small),[10] while Robert K. Buchheim determined a period of Шаблон:Val hours and an amplitude of Шаблон:Val magnitude observing Benda over 10 nights at the Altimira Observatory Шаблон:Obscode in November 2007 (Шаблон:Small).[11] In September 2018, a collaboration of the Italian Amateur Astronomers Union reported a period of Шаблон:Val hours with a brightness variation of Шаблон:Val magnitude (Шаблон:Small).[12]

Diameter and albedo

According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Infrared Astronomical Satellite IRAS, and the Japanese Akari satellite, Benda measures (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val) kilometers in diameter and its surface has an albedo of (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val), respectively.[13][14][15] The Collaborative Asteroid Lightcurve Link derives a low albedo of 0.0387 and a diameter of 70.71 kilometers based on an absolute magnitude of 9.9.[8]

Alternative mean-diameters published by the WISE team include (Шаблон:Val), (Шаблон:Val),[16] (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val) with a corresponding albedo of (Шаблон:Val), (Шаблон:Val), (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val).[4][8] Two asteroid occultations on 4 April 2009 and on 3 September 2013, gave a best-fit ellipse dimension of (Шаблон:Val) and (Шаблон:Val), respectively, each with a low quality rating of 1.[4] These timed observations are taken when the asteroid passes in front of a distant star.[4]

Notes

Шаблон:Notelist

References

Шаблон:Reflist

External links

Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control

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  1. ↑ 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  2. ↑ 2,0 2,1 Ошибка цитирования Неверный тег <ref>; для сносок springer не указан текст
  3. ↑ Ошибка цитирования Неверный тег <ref>; для сносок AstDys-object не указан текст
  4. ↑ 4,0 4,1 4,2 4,3 4,4 Ошибка цитирования Неверный тег <ref>; для сносок Ferret не указан текст
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Zappala-family не указан текст
  6. ↑ Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  7. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Lazzaro-2004 не указан текст
  8. ↑ 8,0 8,1 8,2 8,3 Ошибка цитирования Неверный тег <ref>; для сносок lcdb не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Stephens-2014d не указан текст
  10. ↑ Ошибка цитирования Неверный тег <ref>; для сносок geneva-obs не указан текст
  11. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Buchheim-2009 не указан текст
  12. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Franco-2019a не указан текст
  13. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Mainzer-2016 не указан текст
  14. ↑ Ошибка цитирования Неверный тег <ref>; для сносок SIMPS не указан текст
  15. ↑ Ошибка цитирования Неверный тег <ref>; для сносок AKARI не указан текст
  16. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Masiero-2014 не указан текст
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